Network slicing deployment includes two main phases: creation and runtime [1]}. In the slice creation phase, end user requests a slice from a network slice catalog, the tenant provides the slice immediately upon request. In the runtime phase, different functional blocks whiten each slice, which are already created are now operating and providing service according to the end user's request. Each network resource i.e. NFV and functional block within a specific slice should have its own security mechanisms and must ensure operation within expected parameters in order to prevent access to unauthorized entities. This will lead to guarantee that faults or attacks occurring in one slice are confined to that given slice and will not propagate across slice boundaries. Slicing helps operator to provide new services and applications only by deployment of a slice instead of rolling out a new network, which leads to decrease CAPEX and saves time.
